DBA_HIST_SERVICE_WAIT_CLASS

DBA_HIST_SERVICE_WAIT_CLASS displays the history of wait class information for services as tracked by the Workload Repository. This view contains information from V$SERVICE_WAIT_CLASS.

Column	Datatype	Description
`SNAP_ID`	`NUMBER`	Unique snapshot ID
`DBID`	`NUMBER`	Database ID for the snapshot
`INSTANCE_NUMBER`	`NUMBER`	Instance number for the snapshot
`SERVICE_NAME_HASH`	`NUMBER`	Hash of the service name
`SERVICE_NAME`	`VARCHAR2(64)`	Name of the service
`WAIT_CLASS_ID`	`NUMBER`	Identifier for the class of the wait event
`WAIT_CLASS`	`VARCHAR2(64)`	Name for the class of the wait event
`TOTAL_WAITS`	`NUMBER`	Total number of waits for this event
`TIME_WAITED`	`NUMBER`	Total amount of time waited for this event (in hundredths of a second)